lutein, xanthophyll molecule. it is type of carotenoid, food additive e161b. structural chemical formula on the dark blue

additive angiogenesis antioxidant atom atomic blue bronzing carbon carotene carotenoid carrot cataract chemical chemistry compound dark degeneration dye e161b eye formula fruit hydrogen illustration kale lutein model molecular molecule orange organic pigment science spinach structure supplement tagetes vegetable vegf white xanthophyll yellow yolk zeaxanthin